[ITK-users] How to use a binary mask in a registration process ?

[neon29]

Bradley Lowekamp wrote
> Hello,
> 
> So why do you think the masks are not working? What is the output with and
> without masks? Can you share you data? Is the metric value different with
> and w/o the masks?
> 
> I'd also recommend setting the SamplingStrategy to None until you have the
> masks working they way you expect.
> 
> 
> Brad

I have set the SamplingStrategy to None without noticing any change. Here is
the results of the two registrations (without and with masks) and links to
the resulting image (I only display the masks as I am not sure to be allowed
to share my data):

without masks
<http://itk-insight-users.2283740.n2.nabble.com/file/n7587817/without_masks_ITK.png>
:


0 =   -0.18317 : (-9.999904028900822e-05, -11.044272032278226,
96.60714639019373)
-------------
  1 =   -0.18345 : (-0.0001999990022488051, -11.044272084667545,
96.6071464599318)
-------------
  2 =   -0.18370 : (-0.00029999722853172624, -11.04427252056758,
96.60714686580299)
-------------
  3 =   -0.18362 : (-0.0002499972558627034, -11.04427247476726,
96.60714684059529)
-------------
  4 =   -0.18373 : (-0.0002749970826503679, -11.044272417641816,
96.60714676712918)
-------------
  5 =   -0.18371 : (-0.0002624971035453863, -11.044272397156764,
96.60714675699322)
-------------
itk::simple::Transform
 Euler2DTransform (0x757ad60)
   RTTI typeinfo:   itk::Euler2DTransform<double>
   Reference Count: 4
   Modified Time: 25179210
   Debug: Off
   Object Name: 
   Observers: 
     none
   Matrix: 
     1 0.000262497 
     -0.000262497 1 
   Offset: [-11.1839, 96.788]
   Center: [688.994, 531.823]
   Translation: [-11.0443, 96.6071]
   Inverse: 
     1 -0.000262497 
     0.000262497 1 
   Singular: 0
   Angle       = -0.000262497

--------
Optimizer stop condition: RegularStepGradientDescentOptimizerv4: Step too
small after 6 iterations. Current step (6.25e-06) is less than minimum step
(1e-05).
Number of iterations: 7
--------


with masks 
<http://itk-insight-users.2283740.n2.nabble.com/file/n7587817/masks_ITK.png>
:

0 =   -0.00623 : (9.99985477821897e-05, -11.044271338978085,
96.6071463678905)
-------------
  1 =   -0.00614 : (4.9999718539333366e-05, -11.044271424621682,
96.60714669916005)
-------------
  2 =   -0.00618 : (9.97888121303202e-10, -11.044271528245424,
96.60714704149814)
-------------
  3 =   -0.00623 : (2.500063478804917e-05, -11.044271421099985,
96.60714712319714)
-------------
  4 =   -0.00621 : (4.978968605942277e-05, -11.044270902597372,
96.6071503222739)
-------------
  5 =   -0.00618 : (3.729000935970828e-05, -11.044270928466227,
96.60715040837387)
-------------
  6 =   -0.00619 : (2.4790825641270987e-05, -11.044270949334763,
96.60715054969222)
-------------
itk::simple::Transform
 Euler2DTransform (0x3cce740)
   RTTI typeinfo:   itk::Euler2DTransform<double>
   Reference Count: 4
   Modified Time: 25177171
   Debug: Off
   Object Name: 
   Observers: 
     none
   Matrix: 
     1 -2.47908e-05 
     2.47908e-05 1 
   Offset: [-11.0311, 96.5901]
   Center: [688.994, 531.823]
   Translation: [-11.0443, 96.6072]
   Inverse: 
     1 2.47908e-05 
     -2.47908e-05 1 
   Singular: 0
   Angle       = 2.47908e-05

--------
Optimizer stop condition: RegularStepGradientDescentOptimizerv4: Step too
small after 7 iterations. Current step (6.25e-06) is less than minimum step
(1e-05).
Number of iterations: 8
--------









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